US11241023B2 - Machine for making liquid or semi-liquid food products and method of operating the machine - Google Patents

Machine for making liquid or semi-liquid food products and method of operating the machine Download PDF

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Publication number
US11241023B2
US11241023B2 US16/399,114 US201916399114A US11241023B2 US 11241023 B2 US11241023 B2 US 11241023B2 US 201916399114 A US201916399114 A US 201916399114A US 11241023 B2 US11241023 B2 US 11241023B2
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liquid
container
semi
gas
base product
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US20190335786A1 (en
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Andrea COCCHI
Roberto Lazzarini
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Ali Group SRL
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Ali Group SRL
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Assigned to ALI GROUP S.R.L. - CARPIGIANI reassignment ALI GROUP S.R.L. - CARPIGIANI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Cocchi, Andrea, LAZZARINI, ROBERTO
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/28—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups for portioning or dispensing
    • A23G9/281—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups for portioning or dispensing at the discharge end of freezing chambers
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/14—Continuous production
    • A23G9/16—Continuous production the products being within a cooled chamber, e.g. drum
    • A23G9/166—Feeding arrangements
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/08—Batch production
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/08—Batch production
    • A23G9/12—Batch production using means for stirring the contents in a non-moving container
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/20—Production of frozen sweets, e.g. ice-cream the products being mixed with gas, e.g. soft-ice
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/224—Agitators or scrapers
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/228—Arrangement and mounting of control or safety devices
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
    • A23G9/04—Production of frozen sweets, e.g. ice-cream
    • A23G9/22—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups
    • A23G9/28—Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups for portioning or dispensing

Definitions

  • This invention relates to a machine for making liquid or semi-liquid food products, in particular ice cream or soft ice cream type products and to a method for operating the machine.
  • ice cream machines which comprise a batch freezing cylinder associated with a refrigeration system and equipped with a stirrer.
  • the batch freezing cylinder allows making the finished product (ice cream or soft ice cream) from a basic mixture.
  • a first type of machine comprises a feed tank connected to the batch freezing cylinder by a connecting duct.
  • the feed tank allows supplying the batch freezing cylinder with a liquid or semi-liquid base product mixed with air.
  • the tank normally includes a device for mixing the base product with air so as to feed a base mixture (containing base product and air) to the batch freezing cylinder.
  • the batch freezing cylinder When the amount of finished product in the batch freezing cylinder decreases as a result of being dispensed, the batch freezing cylinder must obviously be supplied with more base mixture through the connecting duct; under these transient conditions, it is particularly difficult, in prior art machines, to feed the mixture of air and base liquid in the correct stoichiometric ratio.
  • overrun ((liquid base product weight ⁇ finished product weight)/(finished product weight))*100.
  • a particularly strongly felt need is that of being able to make a product having a particularly high overrun.
  • This invention therefore has for an aim to meet the above mentioned needs, that is to say, more specifically, to be able to provide a machine (and a method for operating the machine) for making and dispensing liquid or semi-liquid food products, specifically products of the ice cream or soft ice cream type, which can ensure that the batch freezing cylinder is fed in optimum manner under any operating conditions.
  • a further aim of this invention is to provide a machine (and a method for operating the machine) for making and dispensing liquid or semi-liquid food products and which can ensure that the product made has a particularly high overrun.
  • FIG. 1 is a schematic side view of a first embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 2 schematically illustrates a detail of the machine of FIG. 1 ;
  • FIG. 3 is a schematic side view of a second embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 4 is a schematic side view of a third embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 5 is a schematic side view of a fourth embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 6 is a schematic side view of a fifth embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 7 is a schematic side view of a sixth embodiment of the machine of this invention for making liquid or semiliquid products
  • FIG. 8 is a schematic side view of a seventh embodiment of the machine of this invention for making liquid or semiliquid products
  • FIGS. 9-11 are, respectively, a top view, a perspective view and an exploded view of a detail of the embodiment shown in FIG. 8 ;
  • FIG. 12 is a perspective view of a detail of the embodiment of FIG. 8 according to a variant different from that of FIGS. 9-11 ;
  • FIGS. 13-14 are partial cross sections of a detail from FIG. 12 .
  • the numeral 1 denotes an apparatus or machine for making food products (preferably liquid or semi-liquid).
  • the machine 1 is a machine for making ice cream.
  • the machine 1 is a machine for making soft ice cream (or similar products such as sorbets, etc.).
  • the machine 1 for making food products comprises a frame 2 .
  • the machine 1 comprises at least one first container 3 adapted to contain a liquid or semi-liquid base product
  • the first container 3 is a tank (open at the top and closable with a lid).
  • the first container 3 has a stirrer 35 inside it.
  • the first container 3 has a hole 50 on the bottom of it to allow the product it contains to flow out.
  • the machine 1 comprises a second container 5 , defining a processing chamber for processing a base mixture (made up of the liquid or semi-liquid base product and a gas, the latter preferably being air).
  • the machine 1 is also provided with a stirrer 6 and with thermal treatment means 7 for the basic mixture, operating in conjunction with one another to convert the basic mixture into a liquid or semi-liquid product.
  • the second container 5 is preferably cylindrical in shape.
  • the stirrer 6 is configured to scrape the inside wall of the second container 5 .
  • the thermal treatment means 7 comprise a thermodynamic system adapted to run a thermodynamic cycle.
  • thermodynamic system preferably comprises a closed circuit containing a heat exchanger fluid.
  • thermodynamic system preferably comprises a compressor (not illustrated) disposed along the circuit.
  • thermodynamic system preferably comprises a first exchanger (not illustrated), disposed along the circuit.
  • thermodynamic system preferably comprises a second exchanger 36 disposed along the circuit.
  • the second exchanger 36 is associated with the second container 5 .
  • the thermodynamic system preferably comprises a pressure reducing element (e.g. a throttle valve, not illustrated) disposed along the circuit.
  • a pressure reducing element e.g. a throttle valve, not illustrated
  • thermodynamic system preferably comprises a further, third exchanger 100 associated with the first container 3 .
  • thermodynamic system forms an active part of the closed circuit.
  • the compressor is disposed in one leg of the circuit, interposed between an inlet of the first exchanger and an outlet of the second exchanger 36 , whilst the pressure reducing element is disposed in another leg of the circuit, between an outlet of the first exchanger and an inlet of the second exchanger 36 .
  • thermodynamic cycle is preferably a vapor compression cycle.
  • the machine 1 comprises a connecting duct 8 connecting the first container 3 to the second container 5 and configured to connect the first container 3 to the second container 5 in such a way as to allow the base mixture (that is, the base product mixed with gas) to be transferred from the first container 3 to the second container 5 .
  • a connecting duct 8 connecting the first container 3 to the second container 5 and configured to connect the first container 3 to the second container 5 in such a way as to allow the base mixture (that is, the base product mixed with gas) to be transferred from the first container 3 to the second container 5 .
  • the machine 1 comprises a dispenser 33 connected to the first container 5 to allow the product to be extracted.
  • the dispenser 33 can be turned on or off to allow or inhibit dispensing of the product from the container 5 , respectively.
  • the duct 8 is preferably connected to a tubular supply element 40 .
  • tubular supply element 40 is, in use, disposed inside the first container 3 .
  • the machine 1 comprises at least one regulating device 11 for regulating the supply of base mixture to the second container 5 to regulate the supply pressure or flow rate of one between, or both, the liquid or semi-liquid base product and the gas.
  • the machine 1 comprises at least one regulating device 11 for regulating the supply of base mixture to the second container 5 so as to independently regulate the supply pressure or flow rate of the liquid or semi-liquid base product and the gas.
  • the flow rate or pressure of the liquid or semi-liquid base product and the gas are regulated independently of each other.
  • FIG. 8 when it comprises the regulating device 11 illustrated in FIGS. 9-11 .
  • the regulating device 11 comprises a rotary element 11 B mounted inside the first container 3 and configured to move the liquid or semi-liquid base product and to feed the liquid or semi-liquid base product into the connecting duct 8 .
  • rotary element 11 B is connected to a motor 104 (illustrated schematically) adapted to drive it in rotation.
  • the rotary element 11 B rotates about a vertical axis.
  • the rotary element 11 B is composed of a plurality of radial blades 102 .
  • the rotary element 11 B is composed of a base portion 101 (preferably rod-shaped) and radial blades 102 .
  • the rotation of the radial blades 102 allows moving the liquid or semi-liquid base product—in other words, allows imparting to the liquid or semi-liquid base product (inside the container 3 ) a peripheral speed (according to another aspect, also adjustable according to need).
  • control unit 10 of the machine 1 is configured to control the rotational drive of the rotary element 11 B according to predetermined (and modifiable) operating rotation speeds.
  • control unit 10 of the machine 1 can drive the rotary element 11 B in rotation at different operating speeds so that the radial blades impart to the base liquid different motion configurations, that is to say, different operating speeds.
  • the duct 8 is disposed in proximity to the rotary element 11 B.
  • the duct 8 is provided with an inlet section 8 A.
  • the inlet section 8 A comprises an opening in the duct 8 .
  • the inlet section 8 A comprises a flow directing member 42 for directing the flow of liquid moved by the rotary element 11 B.
  • the flow directing member 42 comprises a first wall 44 , disposed in proximity to the bottom of the first container 3 .
  • the first wall 44 is a vertical wall.
  • the first wall 44 is curvilinear.
  • the flow directing member 42 comprises a second wall 43 , extending horizontally.
  • the second wall 43 is connected to the first wall 44 .
  • the second wall 43 is connected to the first wall 44 and disposed above the first wall 44 .
  • first wall 44 and the second wall 43 together define a flow directing channel for directing the base liquid (moved by the rotary element 11 B) from the container 3 towards the duct 8 .
  • the regulating device 11 comprises a gas feed device 11 A configured to feed gas into the connecting duct 8 at a predetermined flow rate/pressure.
  • the gas feed device 11 A is configured to allow regulating the flow rate/pressure of the gas fed in.
  • the gas feed device 11 A is a pump adapted to increase the pressure of the gas.
  • the gas is air.
  • control and drive unit 10 drives the air feed device 11 B and the rotary element 11 B independently of each other so as to independently regulate the supply pressure or flow rate of both the liquid or semi-liquid base product and of the gas (that is to say, to regulate the supply pressure or flow rate of the liquid or semi-liquid base product and of the gas independently of each other).
  • the regulating device 11 comprises the aforementioned rotary element 11 B (having the same features and functions as those described above with reference to FIGS. 9-11 ).
  • This embodiment also comprises a tubular supply element 40 , connected to the duct 8 .
  • the tubular supply element 40 as shown in FIGS. 12-14 , is provided with a valve 200 adapted to enable or inhibit the flow of gas/liquid or semi-liquid base product mixture in the duct 8 .
  • tubular supply element 40 The operation of the tubular supply element 40 is described below.
  • the valve 200 is driven (i.e. switched from a closed condition C 1 , illustrated in FIG. 13 , to an open condition A 1 , illustrated in FIG. 14 ) directly by a pressurized gas entering the tubular supply element 40 .
  • valve 200 Normally—that is to say, in the absence of pressurized gas—the valve 200 is in a closed configuration C 1 ( FIG. 13 ) in which it inhibits the mixture of gas and liquid or semi-liquid base product from flowing in the duct 8 .
  • valve 200 switches to the open configuration A 1 ( FIG. 14 ) in which it enables the mixture of gas and liquid or semi-liquid base product to flow in the duct 8 .
  • the closed and open configurations C 1 and A 1 of the valve 200 are described in more detail below.
  • the tubular supply element 40 is provided with a pressurized gas inlet 202 .
  • the valve 200 is defined by a chamber 201 and a membrane 203 .
  • the membrane 203 is deformable (flexible).
  • the chamber 201 is in direct fluid communication with the pressurized gas inlet 202 .
  • the deformable membrane 203 is disposed in such a way as to define a wall (at the top) of the chamber 201 .
  • the valve 200 further comprises a rod 400 B which is slidable in the tubular element 200 .
  • the rod 400 B defines a shutter 406 of the valve 200 .
  • the rod 400 B is preferably a tubular rod, that is to say, it is provided with a longitudinal channel (leading out at an opening 402 at the bottom of it).
  • the chamber 201 is connected (in fluid connection) with the internal cavity of the tubular element 40 .
  • the rod 400 B is connected (at the top) to the membrane 203 .
  • the rod 400 B is also provided (in the zone near the top of its side wall) with an opening 401 leading into the longitudinal internal cavity of the rod itself.
  • the gas flows through the opening 401 and proceeds through the internal channel (longitudinal cavity) of the rod 400 B and, when the valve is in the open configuration A 1 , out through the opening 402 at the bottom of the channel of the rod 400 B.
  • the valve 200 also comprises a sealing gasket 404 adapted to seal (that is, to come into abutment against) the inside wall of the longitudinal cavity of the internal tubular element 40 when the valve 200 is in the closed configuration C 1 ( FIG. 13 ).
  • the membrane 404 leaves a gap between the chamber 201 and the longitudinal cavity 401 of the tubular element 40 , allowing the gas to flow through.
  • the gas entering through the inlet 202 can flow through the gap and into the (longitudinal) cavity 401 of the rod 400 B.
  • Any base product present in the container 3 is pushed by the rotary element 11 B, specifically by the radial blades 102 , into a chamber 60 connected to the duct 8 .
  • the valve 200 also comprises a further (second) gasket 405 .
  • the further (second) gasket 405 is associated with the (bottom portion of the) rod 400 B, that is to say, it is mounted on the rod 400 B.
  • the further (second) gasket 405 comes into abutment against an opening 61 (at the bottom) of the chamber 60 , thereby closing the opening 61 of the chamber 60 and preventing the liquid or semi-liquid base product from flowing out of the chamber 60 (hence preventing the liquid or semi-liquid base product from being fed into the duct 8 ).
  • the opening 61 puts the chamber 60 in communication with the duct 8 .
  • the pressure of the gas at the inlet 202 (if greater than a predetermined value) causes the rod 400 B to rise and thus to create a gap between the chamber 201 and the sealing gasket 404 , allowing the gas to flow through.
  • the upstroke of the rod 400 B causes the gasket 405 to move and thus to form a gap through which the liquid or semi-liquid base product can flow out of the chamber 60 towards the duct 8 .
  • the valve 200 is driven by the pressure of the gas (specifically by the pressure of the gas at the inlet 202 ): if the pressure of the gas is less than a predetermined value, the valve 200 is in the closed configuration C 1 (“normally closed” condition); on the other hand, if the pressure is greater than the predetermined value, the valve 200 is in the open configuration A 1 .
  • the rod 400 B may be disposed at a plurality of positions in the open configuration: that way, it is possible to adjust, as a function of the gas pressure, the size of the gaps created at the gaskets 404 and 405 for the flow of gas and base product, respectively, thereby regulating the flow rates of gas and liquid or semi-liquid base product.
  • a particularly high overrun in the finished product corresponds to a particularly high quality in terms of organoleptic properties.
  • the machine 1 comprises at least one regulating device 11 for regulating the supply of base mixture to the second container 5 (base mixture defined by the base product and the gas mixed therein), and operatively associated with the duct 8 to regulate the supply pressure or flow rate of one between, or both, the liquid or semi-liquid base product and the gas.
  • the regulating device 11 operates independently on the liquid base product and on the gas, whilst in the embodiments of FIGS. 1, 3 and 4 , the regulating device 11 operates on the gas (to regulate the pressure or flow rate thereof) and in the embodiments of FIGS. 5, 6 and 7 , the regulating device 11 operates on the base mixture (to regulate the pressure or flow rate thereof), that is to say, on both the base product extracted from the first container and on the gas.
  • the machine 1 comprises a control and drive unit 10 , which is connected to the base mixture supply regulating device 11 in order to drive (control) the regulating device 11 .
  • the control and drive unit 10 includes an electronic processor and predetermined programming.
  • the control and drive unit 10 drives the supply regulating device 11 which regulates the supply pressure or flow rate of one between, or both, the base product and the gas.
  • the regulating device 11 is a device 11 for regulating the pressure of one of one between, or both, the liquid or semi-liquid base product and the gas.
  • the regulating device 11 is a device 11 for regulating the pressure of the gas (for example, in one of the embodiments of FIGS. 1, 3 and 4 ).
  • the gas is air, that is to say, a mixture of oxygen and nitrogen (corresponding to the air of the environment in which the machine 1 is installed).
  • the regulating device 11 is a pump.
  • the regulating device 11 is a turbine or a compressor.
  • the regulating device 11 is a rotary element adapted to regulate the flow rate and/or the pressure of the liquid or semi-liquid base product and/or of the gas fed along the duct 8 .
  • the rotary element is provided with one or more radial blades adapted to operate rotationally on the liquid or semi-liquid base product and/or on the gas to regulate the flow rate and/or the pressure of the liquid or semi-liquid base product and/or of the gas fed along the duct 8 .
  • the machine 1 comprises a sensor 51 adapted to measure a parameter representing a level of base product inside the first container 3 .
  • the sensor 51 may be a pressure sensor or a level sensor.
  • the sensor 51 is operatively associated with the control and drive unit 10 in such a way that the latter receives a measurement of the parameter representing a level of base product which the sensor 51 measures inside the first container 3 .
  • control unit 10 is configured to drive the regulating device 11 in such a way as to regulate the pressure or the flow rate of one between, or both, the liquid or semi-liquid base product and the gas, as a function of (i.e. based on) the value of the parameter representing a level of base product inside the first container 3 , as measured by the sensor 51 .
  • the control unit 10 is configured to drive the regulating device 11 in such a way as to increase the pressure of the gas according to a function inversely proportional to the level of base product inside the first container 3 .
  • the machine 1 comprises a sensor 52 adapted to measure a parameter representing a pressure inside the second container 5 .
  • the sensor 52 is operatively associated with the control and drive unit 10 in such a way that the latter receives a measurement (measured by the sensor 52 ) of the parameter representing the pressure inside the second container 5 .
  • control unit 10 is configured to drive the supply regulating device 11 in such a way as to regulate the pressure or the flow rate of the at least one between the liquid or semi-liquid base product and the gas, as a function of the value of the parameter representing the pressure inside the second container 5 , as measured by the sensor 52 .
  • FIG. 2 illustrates a part of the machine 1 which is applicable to all the embodiments illustrated and which is described in more detail below.
  • the machine 1 preferably comprises a tubular element 40 coupled to the duct 8 .
  • the tubular supply element 40 is provided with a hole 41 (at least one) for receiving the base product from the first container 3 .
  • tubular element 40 is in fluid communication with the duct 8 (below it).
  • the tubular element 40 is disposed inside the first container 3 .
  • tubular element 40 is connected at one end E 1 to the duct 8 .
  • the tubular element 40 is connected at the other end E 2 to the regulating device 11 .
  • the tubular element 40 preferably comprises a first portion 40 A and a second portion 40 B (connectable to each other).
  • the first portion 40 fits snugly round the outside of the second portion 40 B.
  • the relative position of the first portion 40 A with respect to the second portion 40 B allows adjusting the area of the hole 41 for receiving the base product.
  • the tubular element 40 comprises a further portion 40 C adapted to be inserted into the portions 40 A and 40 B to further adjust the gas passage (that is, the area of the gas passage).
  • the supply regulating device 11 (also referred to herein simply as regulating device 11 ) is operatively associated with the duct 8 (connected directly or indirectly, for example through the tubular element 40 ).
  • the regulating device 11 is connected directly to the tubular element 40 .
  • the machine comprises a control and drive unit 10 (hereinafter also referred to as control unit 10 ), which is connected to the regulating device 11 in order to drive or control the regulating device 11 .
  • control unit 10 a control and drive unit 10
  • the regulating device 11 comprises a device for regulating the flow rate of one of one between, or both, the liquid or semi-liquid base product and the gas (together making up the base mixture).
  • the dispenser 33 is provided with a closing element, movable between a closed position, where dispensing of product is inhibited, and an open position, where dispensing of the product is enabled.
  • the machine 1 comprises a sensor 53 adapted to detect at least the position (or the movement) of the closing element of the dispenser 33 and connected to the control and drive unit 10 .
  • control and drive unit 10 is configured to activate the regulating device 11 when the sensor 53 detects the open position of the closing element of the dispenser 33 .
  • control and drive unit 10 is configured to activate the regulating device 11 when the sensor 53 detects a switch from the open position to the closed position of the closing element of the dispenser 33 .
  • control and drive unit 10 is configured to activate the regulating device 11 when the sensor 53 detects a switch from the closed position to the open position of the closing element of the dispenser 33 .
  • control and drive unit 10 is configured to activate the regulating device 11 when the sensor 53 detects a movement of the closing element of the dispenser 33 .
  • the machine 1 comprises a user interface for adjusting a value of preset pressure (P*) or preset flow rate (PO*) of the gas or liquid or semi-liquid product, or both, and configured to allow selecting a value of pressure (P*) or flow rate (PO*) of the gas or liquid or semi-liquid product, or both.
  • P* preset pressure
  • PO* preset flow rate
  • the user interface is connected to the control and drive unit 10 to transmit the selected value to the control and drive unit 10 .
  • control and drive unit 10 is configured to drive the regulating device 11 to regulate a supply pressure or flow rate of at least one between, or both, the liquid or semi-liquid base product or the gas, in such a way that it is equal to the pressure (P*) or flow rate (PO*) selected from the user interface.
  • the user interface comprises a display and at least one control to allow setting a parameter associated with the preset pressure (P*) or preset flow rate (PO*).
  • the gas is one of the following:
  • the regulating device 11 is configured to compress the gas up to a maximum overpressure of 0.06 bar (meaning by “overpressure” the pressure over and above atmospheric pressure).
  • the regulating device 11 is switched on and off according to a cycle which includes a predetermined ON time (Ton) and a predetermined OFF time (Toff).
  • control unit 10 is configured to switch the regulating device 11 on and off according to cycles which include a predetermined ON time (Ton) and a predetermined OFF time (Toff).
  • the ON time (Ton) is between 20% and 40%, while the OFF time (Toff) is between 80% and 60% (complement to 100 of the ON time).
  • the ON time is between 0.1 seconds and 0.3 seconds and the OFF time is between 0.2 and 0.4 seconds.
  • the machine 1 of the invention allows feeding the second container 5 with a mixture in the correct (required) stoichiometric ratio (between the gas, or air, and base mixture) under any conditions and, specifically, during transients resulting from the dispensing or extraction of a quantity of finished product from the second container 5 .
  • the second container 5 is advantageously fed with a base mixture (base product and gas) having the required stoichiometric ratio between gas and base mixture present in the first container 3 .
  • the machine described herein allows implementing a feed method known as “assisted gravity feed”: in effect, feed from the first container 3 to the second container 5 is performed by gravity (by means of the pressure due to the level of the base product in the first container 3 and the value of the pressure in the second container 5 ) and the regulating device 11 is enabled to allow regulating the pressure or the flow rate of the mixture fed in).
  • assisted gravity feed in effect, feed from the first container 3 to the second container 5 is performed by gravity (by means of the pressure due to the level of the base product in the first container 3 and the value of the pressure in the second container 5 ) and the regulating device 11 is enabled to allow regulating the pressure or the flow rate of the mixture fed in).
  • a negative pressure is generated in the second container 5 , particularly as a result of product being extracted from it and this negative pressure, in the prior art, causes the base mixture to be fed to the second container 5 in an incorrect stoichiometric ratio (base liquid/gas); advantageously, the solution proposed and claimed herein ensures that the proportions of the base liquid product and the gas (specifically air) transferred to the second container 5 remain constant.
  • one advantage of this invention is that of providing a machine capable of making high quality ice cream.
  • the machine 1 ensures feed continuity and stability.
  • the weight of the liquid base product and the weight of the finished product (ice cream) are measured in the same volume, adopted as sample volume.
  • the machine 1 of this invention allows keeping the batch freezing cylinder supplied at all times with base mixture under optimum conditions (that is to say, in the right stoichiometric ratio), particularly in situations where prior art solutions result in an out-of-balance ratio between air and base product.
  • the overrun in the finished product is kept substantially within a predetermined interval of values (preferably constant).
  • the invention defines a method for operating a machine according to any one of the accompanying claims (a method for making a liquid or semi-liquid product, preferably an ice cream type product), comprising the following steps:
  • the step of regulating a supply parameter of the base mixture supplied to the container 5 comprises regulating the supply pressure or flow rate of one between, or both, the liquid or semi-liquid base product and the gas.
  • weight of the base mixture supplied and the weight of the finished product are measured in the same volume, adopted as sample volume.
  • the step of regulating a supply parameter of the base mixture supplied to the second container 5 comprises a step of establishing a laminar or turbulent flow in the liquid or semi-liquid base product and/or gas.
  • the step of regulating a supply parameter of the base mixture supplied to the second container 5 comprises a step of regulating the supply pressure or flow rate of the liquid or semi-liquid base product and gas independently.
  • the supply to the second container 5 can be adjusted precisely and accurately, thereby obtaining a particularly high overrun to meet the customer's expectations.
  • the step of adjusting a supply parameter of the base mixture supplied from the first container 3 to the second container 5 through the duct 8 comprises a step of regulating the pressure or the flow rate of one between, or both, the liquid or semi-liquid base product and the gas supplied through the duct 8 .
  • the step of adjusting a supply parameter of the base mixture supplied from the first container 3 to the second container 5 through the duct 8 comprises a step of measuring a parameter (e.g. pressure, mixture consistency, temperature, level, volume occupied by the product) inside the second container 5 using a sensor in order to adjust the base mixture supply parameter on the basis of the value measured by the sensor.
  • a parameter e.g. pressure, mixture consistency, temperature, level, volume occupied by the product
  • the step of adjusting a supply parameter of the base mixture supplied from the first container 3 to the second container 5 through the duct 8 comprises adjusting a supply parameter of the base mixture supplied through the duct 8 in order to keep the overrun parameter substantially constant at a high-performing, preset value.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Manufacturing & Machinery (AREA)
  • Confectionery (AREA)
US16/399,114 2018-05-02 2019-04-30 Machine for making liquid or semi-liquid food products and method of operating the machine Active 2040-03-02 US11241023B2 (en)

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Application Number Priority Date Filing Date Title
IT102018000005008 2018-05-02
IT102018000005008A IT201800005008A1 (it) 2018-05-02 2018-05-02 Macchina per la realizzazione di prodotti alimentari liquidi o semiliquidi e metodo di funzionamento di detta macchina.
IT102018000008193 2018-08-27
IT102018000008193A IT201800008193A1 (it) 2018-08-27 2018-08-27 Macchina per la realizzazione di prodotti alimentari liquidi o semiliquidi e metodo di funzionamento di detta macchina.

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US20190335786A1 US20190335786A1 (en) 2019-11-07
US11241023B2 true US11241023B2 (en) 2022-02-08

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EP3563691A1 (en) 2019-11-06
KR20190126727A (ko) 2019-11-12
US20190335786A1 (en) 2019-11-07
EP3563691C0 (en) 2023-06-07
JP2019193625A (ja) 2019-11-07
EP3563691B1 (en) 2023-06-07
CN110432373A (zh) 2019-11-12

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